Tag: ASTM
ASTM D7803-Standard for Preparing HDG steel rau hmoov txheej
ASTM D7803 Choj yog ib qho piv txwv ntawm kev tsim kho tej yaam num uas feem ntau ua los ntawm kub-dip galvanized hlau. Yuav ua li cas rau cov hlau no tsis muaj adhesion tsis ua hauj lwm ntawm cov hmoov txheej tau piav qhia nyob rau hauv tus qauv ASTM tshiab. Tus txheej txheem tshiab, ASTM D7803, "Kev Xyaum rau Kev Npaj Zinc (Kub-Dip Galvanized) Coated Hlau thiab Hlau Khoom thiab Khoom Kho Vaj Tse rau Hmoov Txheej" suav nrog kev npaj nto thiab thermal pretreatment ntawm hlau thiab hlau cov khoom thiab cov khoom kho vajtse uas tsis tau pleev xim los yog hmoov coated yav tas losNyeem ntxiv…